Having been chromized frstt then, the aluminum single plate Is processed with fiuorocarbon

spray coating. Fluorine carbon cating has outstanding characteitics of corroslon resistance and

weathering resistance, resisting acid rain, salt fog and various kinds of air contaminants. Besides, it

has good performance of thermal and cold endurance, meanwhile, It not only can resist strong

utraviolet Iay, keeping unfading and chalking with long if-timne apliation.